/// <summary>
/// Begin streaming buffers.
/// </summary>
public unsafe void StreamBuffers()
{
if (LinuxVideoInterop.ReqBufs(this.handle, NumberOfDriverBuffers, LinuxVideoInterop.Memory.MemoryMapping) != NumberOfDriverBuffers)
{
throw new IOException("Could not allocate buffers.");
}
try
{
// enque and memory map all the buffers
for (var i = 0u; i < NumberOfDriverBuffers; i++)
{
var buf = LinuxVideoInterop.QueryBuf(this.handle, i);
LinuxVideoInterop.EnqueBuffer(this.handle, buf);
this.buffers[i] = new BufferInfo()
{
Initialized = true,
Start = LinuxVideoInterop.MemoryMap(this.handle, buf),
Buffer = buf,
};
}
LinuxVideoInterop.StreamOn(this.handle);
this.background = new Thread(new ThreadStart(this.ProcessFrames))
{
IsBackground = true
};
this.isStopping = false;
this.background.Start();
}
catch
{
for (var i = 0u; i < NumberOfDriverBuffers; i++)
{
var buf = this.buffers[i];
if (buf.Initialized)
{
LinuxVideoInterop.MemoryUnmap(buf.Buffer);
}
}
throw;
}
}
/// <summary>
/// Dispose image frame (re-enqueuing underlying driver buffer).
/// </summary>
public void Dispose()
{
LinuxVideoInterop.EnqueBuffer(this.handle, this.buffer);
}